CN108664423A - Electronic device and storage card access method - Google Patents
Electronic device and storage card access method Download PDFInfo
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- CN108664423A CN108664423A CN201710188056.8A CN201710188056A CN108664423A CN 108664423 A CN108664423 A CN 108664423A CN 201710188056 A CN201710188056 A CN 201710188056A CN 108664423 A CN108664423 A CN 108664423A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/14—Handling requests for interconnection or transfer
- G06F13/16—Handling requests for interconnection or transfer for access to memory bus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
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- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a kind of electronic device and storage card access methods.Storage card access method is applied to an electronic device.One processing unit of the electronic device can access a storage card by a storage card slot, and this method includes：Detect whether the storage card supports a quick perimeter component interconnection interface interface；When the non-support quick perimeter component interconnection interface interface of the storage card, so that the processing unit is passed through a first data transmission path and access the storage card, and the Data Format Transform between a transport interface interface and the quick perimeter component interconnection interface interface is carried out using the storage card access unit on the first data transmission path；And when the storage card supports the quick perimeter component interconnection interface interface, so that the processing unit is passed through one second data transfer path and access the storage card, wherein second data transfer path is that the processing unit and the storage card is allowed to pass through the quick perimeter component interconnection interface interface transmission data.
Description
Technical field
The present invention relates to quick perimeter component interconnection (Peripheral Component Interconnect Express,
PCI-Express, hereinafter referred to as PCIe) interface more particularly to PCIe storage cards.
Background technology
Fig. 1 is the schematic diagram that existing electronic device connects storage card.Electronic device 10 (is, for example, desktop computer, notebook
Computer, tablet computer, handset device) include processing unit 110, storage card access unit 130 and storage card slot 150.Place
It manages unit 110 and accesses the storage card 15 for being inserted into storage card slot 150 by storage card access unit 130.Processing unit 110 with deposit
Transport interface interface 120 between card storage access unit 130 is, for example, common PCIe interfaces；Storage card access unit
Transport interface interface 140 between 130 and storage card 15 be, for example, common secure digital (secure digital, it is simple below
Claim SD) interface.The major function of storage card access unit 130 is to provide between PCIe interfaces and SD interfaces
Data format biography change.
Since PCIe interfaces gradually become mainstream, future, storage card 15 may can be straight using PCIe interfaces
It connects and links up (imply that and be not required to through storage card access unit 130) with processing unit 110.However at new storage card (PCIe storage cards)
With the transition period of old storage card (SD storage cards) conversion, electronic device 10 is most probably designed to by the manufacturer of electronic device 10
With the ability for reading new and old storage card.But since processing unit 110 only provides the channels PCIe (lane) of limited quantity, if electric
The PCIe channel allocations of processing unit 110 (are passed through storage by the manufacturer of sub-device 10 for card-reading function to SD storage cards
Card access unit 130 accesses) and PCIe storage cards (being directly accessed), then will Xi domestic animals electronic device 10 to other peripheral devices
Support, for example, display card, wireless communication module (such as WIFI, Long Term Evolution (Long Term Evolution, LTE),
Bluetooth (Bluetooth) etc.), wire communication module (such as Ethernet etc.), storage device (such as solid state disk etc.) and logical
With sequence remittance drainage (Universal Serial Bus, USB) control module etc..
In addition, when electronic device 10 supports new and old storage card simultaneously, user must differentiate before being inserted into storage card
The type of storage card, this will cause to use upper inconvenience.Furthermore when processing unit 110 is directly accessed storage card 15, Ke Nengyin
The efficiency of data transmission is reduced for storage card 15 and 150 poor contact of storage card slot or even generates access errors.
Invention content
In view of the deficiencies in the prior art, of the invention one is designed to provide a kind of storage card access module and storage card is deposited
Take method.
The present invention discloses a kind of electronic device, is coupled between a processing unit and a storage card slot, for accessing one
Storage card.The device includes a detection unit, a selecting unit, a storage card access unit and a control unit.Detection unit
For detecting whether the storage card supports a quick perimeter component interconnection interface interface.Selecting unit is used for selecting one first data
Transmission path or one second data transfer path, wherein second data transfer path are to allow the processing unit and the storage card
Pass through the quick perimeter component interconnection interface interface transmission data.Storage card access unit is used for accessing the storage card and provides one
Data Format Transform between transport interface interface and the quick perimeter component interconnection interface interface.Control unit is used for working as the inspection
When survey unit indicates that the storage card supports the quick perimeter component interconnection interface interface, control the selection Unit selection second number
According to transmission path, and when the detection unit indicates the non-support quick perimeter component interconnection interface interface of the storage card, control
The selection Unit selection processed first data transmission path.
The present invention separately discloses a kind of storage card access method, is applied to an electronic device, and a processing of the electronic device is single
Member can access a storage card by a storage card slot, and this method includes：Detect whether the storage card supports a quick peripheral group
Part interconnection interface interface；When the non-support quick perimeter component interconnection interface interface of the storage card, the processing unit is made to pass through
One first data transmission path accesses the storage card, and accesses list using the storage card being located on the first data transmission path
Member carries out the Data Format Transform between a transport interface interface and the quick perimeter component interconnection interface interface；And when this is deposited
When the quick perimeter component interconnection interface interface is supported in card storage, so that the processing unit is passed through the access of one second data transfer path should
Storage card, wherein second data transfer path are that the processing unit and the storage card is allowed to be interconnected by the quick perimeter component
Interface transmission data.
The present invention separately discloses a kind of electronic device, is coupled between a processing unit and a slot, is used for selectively straight
Connect one quick peripheral assembly interconnection equipment of access.The device includes a detection unit, a selecting unit, a storage card access unit
An and control unit.Detection unit be used for detect connect the slot an equipment be for the no quick peripheral assembly interconnection equipment.
Selecting unit is used for selecting a first data transmission path or one second data transfer path, wherein second data transfer path
It is that the processing unit and the quick peripheral assembly interconnection equipment is allowed to transmit number by a quick perimeter component interconnection interface interface
According to.Storage card access unit is used for accessing a storage card and provides a transport interface interface and the quick perimeter component interconnection interface
Data Format Transform between interface.Control unit is used for indicating that the equipment is the quick perimeter component interconnection when the detection unit
When equipment, control the selection Unit selection second data transfer path, and when the detection unit indicates that the equipment is non-for this
When quick peripheral assembly interconnection equipment, the selection Unit selection first data transmission path is controlled.
The electronic device and storage card access method of the present invention can make electronic device straight with the same PCIe interfaces
Access PCIe device or the non-PCIe device of indirect access are connect, reaches the technique effect of shared PCIe interfaces, to reduce PCIe
The usage amount in channel.When access applied to PCIe storage cards, the present invention provides the interface of user friendly；In addition, this
Invention can also add reinforcing transmission signal interlock circuit, and efficiency when accessing storage card to improve simultaneously reduces the several of access errors
Rate.Compared to the complicated circuit of existing PCIe exchangers (PCIe switch), the present invention can reach shared with simple circuit
The purpose of PCIe interfaces, not only saving cost also reduces the difficulty of circuit design.
Feature, implementation and technique effect for the present invention, hereby attached drawing being coordinated to make embodiment, detailed description are as follows.
Description of the drawings
Fig. 1 is the schematic diagram that existing electronic device connects storage card；
Fig. 2 is the functional-block diagram of an embodiment of the storage card access module of the present invention；
Fig. 3 A~3D are the flow chart of an embodiment of the storage card access method of the present invention；
Fig. 4 is the connection diagram of processing unit and storage card access unit；
Fig. 5 is the functional-block diagram of another embodiment of the storage card access module of the present invention；
Fig. 6 A~6C are the detailed step of the storage card access method of the storage card access module of corresponding diagram 5；And
Fig. 7 is the shared schematic diagram of the coupled capacitor of PCIe interfaces.
Reference sign：
10,20,50 electronic device
15,25 storage card
110,210,710 processing unit
120,140,220,232,234,236,536,538 transport interface interface
130,233 storage card access unit
150 storage card slots
230,530,720,770 storage card access module
250 slots
231 selecting units
235,535 control unit
237 detection units
410 coupled capacitors
420a, 420b are switched
430a, 430b resistance
539 signals optimize unit
730 PCIe devices
740,750,780 capacitance group group
S310~S640 steps
Specific implementation mode
The technical terms of following description are the idioms with reference to the art, if this specification is to part term
Be illustrated or define, the explanation of the part term be subject to this specification explanation or definition.
The disclosure includes storage card access module and storage card access method.Due to the storage card of the present invention
May be well known elements for subelement that access module is included is independent, therefore in the abundant public affairs for not influencing the device inventions
Open and exploitativeness under the premise of, illustrate that the details of well known elements will be omitted below.In addition, the storage card of the present invention
Access method can be through the invention storage card access module or its equivalent device execute, do not influencing filling for this method invention
Under the premise of point open and exploitativeness, the explanation of following methods invention will focus on step content and non-hardware.
Fig. 2 is the functional-block diagram of an embodiment of the storage card access module of the present invention.Storage card access module 230 is real
Make in electronic device 20, and is coupled between the processing unit 210 and slot 250 of electronic device 20.Processing unit 210 is electricity
The systemonchip (System on Chip, SoC) or chipset (chipset) of sub-device 20, e.g. central processing unit,
Microprocessor etc..Slot 250 is inserted into for storage card 25 or other equipment.Storage card access module 230 includes selecting unit
231, storage card access unit 233, control unit 235 and detection unit 237.Transport interface interface 220, transport interface interface
232 and transport interface interface 236 be PCIe interfaces, and transport interface interface 234 be SD interfaces.Storage card access is single
The one of the major function of member 233 is to provide the biography of the data format between PCIe interfaces and SD interfaces and changes.Control is single
Member 235 can be for example with logic circuit or microcontroller implementation.
Fig. 3 A~3D are the flow chart of an embodiment of the storage card access method of the present invention.Detection unit 237 detects
It is no to there is storage card to be inserted into slot 250 (such as detecting foot position by the card of memory card slot) (step S310).When control unit 235 according to
When learning that no storage card is inserted into according to the control signal of detection unit 237, control unit 235 controls electronic device 20 in default shape
State (step S320).In detail, this preset state can be (1) transport interface interface 220 in use, that is, processing unit 210
Line is established by transport interface interface 220 and transport interface interface 232 with storage card access unit 233；Or (2) transmit boundary
During face interface 220 is not used, that is, processing unit 210 does not establish line by transport interface interface 220 and any device.
In state (1), 235 control selections unit 231 of control unit selects first data transmission path (comprising transmission circle
Face interface 232, storage card access unit 233 and transport interface interface 234) (the step S321 of Fig. 3 B), and control storage card and deposit
233 carry of unit (load) is taken to hold resistance (termination resistor) (the step S323 of Fig. 3 B).In state (2),
Control unit 235 can (A) control selections unit 231 select first data transmission path (the step S325 of Fig. 3 C), and control
Storage card access unit 233 unloads (unload) end resistance (the step S327 of Fig. 3 C)；Or (B) control selections unit 231 selects
Second data transfer path (including transport interface interface 236) (the step S329 of Fig. 3 D).
Carry and the datail description for unloading end resistance are as follows.Fig. 4 is processing unit 210 and storage card access unit 233
Connection diagram, and illustratively show a channel of PCIe interfaces.As shown, a channel is passed comprising a difference
It send to Tx and a differential received to Rx (transmission and reception herein is for storage card access unit 233).Difference transmission pair
Tx and differential received include respectively two transmission lines (transmission line) to Rx, and respectively there are one couplings for each transmission lines
Capacitance 410.Storage card access unit 233 includes switch 420a, 420b and resistance 430a, 430b.Carry resistance means storage card
Access unit 233 makes resistance 430a, 430b connect according to control Signal-controlled switch 420a, 420b conducting of control unit 235
The differential received in the channels PCIe unloads resistance and means that storage card access unit 233 is believed according to the control of control unit 235 to Rx
Number control switch 420a, 420b be not turned on.If note that, switch 420a, 420b are at conducting state originally, " carry end
Resistance " operation means that storage card access unit 233 need to not execute any action and (that is, may skip the step of related " carry end resistance "
Suddenly), the operation for " unloading end resistance " is similarly.
Fig. 3 A are returned to, are determining rear (step S310 is judged as YES) for having storage card to be inserted into slot 250, detection unit 237
The type of the storage card of insertion is more detected, that is, it is that PCIe storage cards (support PCIe interfaces to detect the storage card being inserted into
Storage card) or other storage cards, such as SD storage cards (storage card for supporting SD interfaces) (step S330).Detection unit
237 can be detected using two kinds of detection methods below, and but not limited to this.Method one is inspection defined in PCIe standard
Survey method, that is, detection unit 237 is judged using the charging time of periodic pulse measurement capacitance.Specifically, when
When PCIe storage cards are inserted into slot 250, the parasitic capacitance on slot 250 can increase, and keep the charging time elongated.Method is second is that judge
Whether the voltage of the clock pulse pin requirement (CLKREQ#) of PCIe interfaces changes.Because when PCIe storage cards are inserted into slot 250
When, PCIe storage cards can be initialized first, and PCIe storage cards may require that the clock pulse of an outside when initialization.PCIe storage cards
When requiring clock pulse to host side (host) (that is, electronic device 20), the current potential on clock pulse pin will be caused to change.
Control unit 235 determines next storage card access module 230 will operate according to the testing result of detection unit 237
In non-PCIe device access mode or PCIe device access mode.When detection unit 237 indicates that storage card is non-PCIe storage cards
When (step S330 is judged as NO), control unit 235 controls storage card access module 230 and operates in non-PCIe device access mode
(step S340), it is on the contrary then control storage card access module 230 and operate in PCIe device access mode (step S350).Non-
Under PCIe device access mode, 235 control selections unit 231 of control unit is switched to 233 (step of storage card access unit
S342), and 233 carry end resistance (step S344) of storage card access unit is controlled；Also that is, in such a mode, control unit
235 make processing unit 210 and storage card access unit 233 connect and can transmit data.Under PCIe device access mode,
235 control selections unit 231 of control unit is switched to PCIe device (step S352)；Also that is, in such a mode, control unit
235 make processing unit 210 be directly accessed PCIe storage cards by transport interface interface 236.
Fig. 5 is the functional-block diagram of another embodiment of the storage card access module of the present invention.Storage card access module 530
It is implemented into electronic device 50, and is coupled between the processing unit 210 and slot 250 of electronic device 50.Processing unit 210 is
The systemonchip or chipset of electronic device 50.Storage card access module 530 includes selecting unit 231, storage card access list
Member 233, control unit 535, detection unit 237 and signal optimize unit 539.Transport interface interface 536 and transport interface interface
538 be PCIe interfaces.The element of identical number function having the same, repeats no more in Fig. 2 and Fig. 5.Control unit 535
It can be for example with logic circuit or microcontroller implementation.
Because storage card 25 and slot 250 probably due to poor contact or terminal oxidation and reduce data transmission efficiency or
Access errors even are caused, so the present embodiment setting signal optimization unit 539 comes between storage card 25 and processing unit 210
Transmission signal when being strengthened (such as Redriver) and/or reset (Retimer), or protocol aware is added
Protocol analysis such as (protocol aware) handle to be adjusted protocol contents.In response to this embodiment, the step S320 of Fig. 3
And step S350 some micro-adjustments.
For step S320, in state (1) (that is, in 220 use of transport interface interface), control unit 535 can be with
(A) (corresponding diagram 3B) control selections unit 231 selects first data transmission path (to be deposited comprising transport interface interface 232, storage card
Take unit 233 and transport interface interface 234), and control 233 carry end resistance of storage card access unit；Or (B) (corresponding diagram
6A) control selections unit 231 select the second data transfer path (comprising transport interface interface 536, signal optimization unit 539 and
Transport interface interface 538) (step S610), and control signal optimization 539 carry end resistance (step S620) of unit.In state
(2) (that is, during transport interface interface 220 is not used), control unit 535 can (A) (corresponding diagram 3C) control selections unit 231
First data transmission path is selected, and controls storage card access unit 233 and unloads end resistance；Or (B) (corresponding diagram 6B) control choosing
It selects unit 231 and selects the second data transfer path (step S630), and control signal optimization unit 539 and unload end resistance (step
S640)。
For step S350 (corresponding diagram 6C), after step S352, the further control signal optimization of control unit 535
539 carry end resistance (step S534) of unit, to establish line with processing unit 210 and storage card 25.It note that signal optimizes
One end that unit 539 is connect with processing unit 210 and the one end being connect with storage card 25 include respectively that (the two is all located at pair end resistance
On receiving terminal for signal optimization unit 539).Similar storage card access unit 233, signal optimize unit 539 using switch
Carry/unloading end resistance.Signal optimization unit 539 is how, for example, when driving (redriver) circuit again and/or resetting
(retimer) circuit.
In conclusion the storage card access module of the present invention integrates the transport interface of PCIe storage cards and non-PCIe storage cards
Interface, for electronic device manufacturer plan processing unit the channels PCIe when provide bigger elasticity (also that is, be not required in order to
Support the storage card of two kinds of specifications simultaneously and other PCIe devices of Xi domestic animals or integrating other interfaces using many discrete elements connects
Mouthful), also the operation of more user friendly is provided (also that is, the storage card of two kinds of specifications is all inserted into the same storage card for user
Slot).It is also possible to further the quantity of coupled capacitor on circuit is saved by the manufacturer of help electronic device, with
It reduces cost and simplifies design.In detail, as shown in fig. 7, before PCIe interfaces are unshared (Fig. 7 A), storage card accesses mould
Block 720 (providing the function of reading non-PCIe storage cards) respectively occupies an interface PCIe of processing unit 710 with PCIe device 730
Interface (may include one or several channels), and each interface includes respectively a capacitance group group 740 or 750.As shared PCIe
When interface (Fig. 7 B), that is, storage card access module 770 supports PCIe device (include PCIe storage cards) and non-simultaneously
When PCIe storage cards (such as storage card access module 530 of the storage card access module 230 of Fig. 3 or Fig. 5), it is only necessary to an electricity
Hold group group 780, that is to say, that required capacitance quantity can be made to halve.
The present invention shares PCIe interfaces and is not limited to PCIe storage cards, any other can by the slot of electronic device with
The PCIe device of electronic device connection all belongs to embodiments of the present invention.
Since those skilled in the art of the present technique can understand the disclosure by the disclosure of the device inventions of the disclosure
Therefore the implementation detail of method invention and variation to avoid superfluous text, are not influencing the open request of this method invention and can implement
Under the premise of property, repeat description is omitted herein.Taken off in diagram before note that, the shape of element, size, ratio and
Sequence of step etc. is only to illustrate, and is to understand the present invention for those skilled in the art of the present technique to be used, non-limiting the present invention.
Although the embodiment of the present invention is as described above, however the embodiment is not to be used for limiting the present invention, this technology
Field technology personnel can be according to the present invention the content expressed or implied to the present invention technical characteristic impose variation, all this kind
Variation may belong to the patent protection embodiment sought by the present invention, and in other words, scope of patent protection of the invention must regard
Subject to the as defined in claim of this specification.
Claims (10)
1. a kind of electronic device is coupled between a processing unit and a storage card slot, for accessing a storage card, including：
One detection unit, for detecting whether the storage card supports a quick perimeter component interconnection interface interface；
One selecting unit, for selecting a first data transmission path or one second data transfer path, wherein second data
Transmission path is that the processing unit and the storage card is allowed to pass through the quick perimeter component interconnection interface interface transmission data；
One storage card access unit couples the selection unit and is located on the first data transmission path, for accessing the storage
Block and provide the Data Format Transform between a transport interface interface and the quick perimeter component interconnection interface interface；And
One control unit couples the detection unit, the storage card access unit and the selection unit, refers to for working as the detection unit
When showing that the storage card supports the quick perimeter component interconnection interface interface, control the selection Unit selection second data transmission route
Diameter, and when the detection unit indicates the non-support quick perimeter component interconnection interface interface of the storage card, control the selection
The Unit selection first data transmission path.
2. electronic device as described in claim 1, the wherein detection unit more detect the storage card slot whether be inserted into it is any
Storage card, and when the detection unit indicates that the storage card slot is not inserted into any storage card, which controls the selection
Unit selection second data transfer path.
3. electronic device as described in claim 1, the wherein detection unit more detect the storage card slot whether be inserted into it is any
Storage card, and when the detection unit indicates that the storage card slot is not inserted into any storage card, which controls the selection
The Unit selection first data transmission path.
4. electronic device as claimed in claim 3, wherein the storage card access unit include one end resistance, and work as the detection list
When member indicates that the storage card slot is not inserted into any storage card, which also controls the storage card access unit and unloads the end
Resistance.
5. electronic device as described in claim 1, wherein the storage card access unit include one end resistance, and work as the detection list
When member indicates the storage card non-supports quick perimeter component interconnection interface interface, which more controls the storage card and accesses
The unit carry end resistance.
6. a kind of storage card access method, is applied to an electronic device, a processing unit of the electronic device can pass through a storage
Card slot accesses a storage card, and this method includes：
Detect whether the storage card supports a quick perimeter component interconnection interface interface；
When the non-support quick perimeter component interconnection interface interface of the storage card, the processing unit is made to pass through one first data biography
Defeated path accesses the storage card, and carries out a transmission using the storage card access unit on the first data transmission path
Data Format Transform between interface and the quick perimeter component interconnection interface interface；And
When the storage card supports the quick perimeter component interconnection interface interface, the processing unit is made to pass through one second data transmission
Path accesses the storage card, and wherein second data transfer path is that the processing unit and the storage card is allowed to pass through the quick week
Side component interconnection interface interface transmission data.
7. method as claimed in claim 6, also including：
Detect whether the storage card slot is inserted into any storage card；And
When the storage card slot is not inserted into any storage card, second data transfer path is selected.
8. method as claimed in claim 6, also including：
Detect whether the storage card slot is inserted into any storage card；And
When the storage card slot is not inserted into any storage card, the first data transmission path is selected.
9. a kind of electronic device is coupled between a processing unit and a slot, quickly all for being selectively directly accessed one
Side assembly interconnection equipment, the device include：
One detection unit, for detect connect the slot an equipment be for the no quick peripheral assembly interconnection equipment；
One selecting unit, for selecting a first data transmission path or one second data transfer path, wherein second data
Transmission path is that the processing unit and the quick peripheral assembly interconnection equipment is allowed to be connect by a quick perimeter component interconnection interface
Oral instructions transmission of data；
One storage card access unit couples the selection unit and is located on the first data transmission path, for accessing a storage
Block and provide the Data Format Transform between a transport interface interface and the quick perimeter component interconnection interface interface；And
One control unit couples the detection unit, the storage card access unit and the selection unit, refers to for working as the detection unit
When showing that the equipment is the quick peripheral assembly interconnection equipment, control the selection Unit selection second data transfer path, and
When the detection unit indicate the equipment it is non-for the quick peripheral assembly interconnection equipment when, control the selection Unit selection first number
According to transmission path.
10. electronic device as claimed in claim 9, the wherein detection unit also detect whether the slot is inserted into any equipment,
And when the detection unit indicates that the slot is not inserted into any equipment, the control unit control the selection Unit selection this second number
According to transmission path.
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| CN201710188056.8A CN108664423B (en) | 2017-03-27 | 2017-03-27 | Electronic device and memory card access method |
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| CN201710188056.8A CN108664423B (en) | 2017-03-27 | 2017-03-27 | Electronic device and memory card access method |
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| CN112084073B (en) * | 2019-06-14 | 2023-02-28 | 瑞昱半导体股份有限公司 | Method for executing detection control of write protection instruction, control chip and electronic device |
| CN112486865A (en) * | 2019-09-11 | 2021-03-12 | 瑞昱半导体股份有限公司 | Method and control chip for performing access control of memory device |
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